Atoplee HSS6542 Spiral Groove Step Drill Bit, 3pcs, for Stainless Steel Cutting: Maxedbuy.com

Features: <br> <br> <br>Suit for use in hardness under 28°artifacts,The plate thickness under 5 mm <br> You can use water to cooling it when it is work and it can be used for even longer <br>You can use one drill for diferent aperture <br> No need of center punch.Compared with the ordinary twist drill,it is not easy to break and it can be used for deburring, chamfering and open hole <br> Recommend the drilling speed of 250--400 rpm <br> <br>

Features:<br><br> 100 brand new and high quality.<br><br> It is titanium spiral groove step drill bit.<br><br> Unique step structure, a drill can punch out a variety aperture of holes.<br><br> Does not need center punch to assist it, compared with ordinary hemp flower drill, it is stabler and difficult to be broken.<br><br> It has these functions that hemp flower drill does not have, such as burrs removing, chamfering, punching elliptic hole, etc.<br><br> It is suitable for being installed on the pistol drill and bench drill, applicable for punching on these harder workpieces, such as stainless steel, carbon steel, aluminum plate, iron plate, etc. <br><br> Notes: <br><br> Please water it for cooling while punching so that can prolong its lifetime, rotation rate from 250 to 400 is recommended.